期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 113, 期 30, 页码 10183-10188出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp902697d
关键词
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资金
- National Natural Science Foundation of China [NSFC20704027]
- National 863 project [2007AA021902, 2007AA021804, 2006AA03Z356]
- Specialized Research Fund for the Doctoral Program of Higher Education [200806100065]
- Sichuan Key Project of Science and Technology [2007SGY019]
- New Century Excellent Talents in University [NCET-08-0371]
- Chinese Key Basic Research Program [2004CB518807]
This study aims to develop a novel composite drug delivery system (CDDS) for hydrophobic honokiol delivery: honokiol loaded micelles in thermosensitive hydrogel (honokiol micelles/hydrogel) based on biodegradable poly(ethylene glycol)-poly(epsilon-caprolactone)-poly(ethylene glycol) (PEG-PCL-PEG, PECE) copolymers. In our work, we found that PECE copolymers with different molecular weight and PEG/PCL ratios could be administired to form micelles or thermosensitive hydrogel, respectively. Honokiol loaded PECE micelles (honokiol micelles) were prepared by self-assembly of biodegradable PECE copolymer (PEG(5000)-PCL5000-PEG(5000)) triggered by its amphiphilic characteristic assisted by ultrasonication without using any organic solvents and surfactants. Meanwhile, biodegradable and injectable thermosensitive PIECE hydrogel (PEG(550)-PCL2400-PEG(550)) with a lower sol-gel transition temperature at around physiological temperature was also prepared successfully. Furthermore, the obtained honokiol micelles/hydrogel CDDS was a free-flowing sol at ambient temperature and became a nonflowing gel at body temperature. The cytotoxicity results showed that the CDDS was a safe carrier and the encapsulated honokiol retained its potent antitumor effect. In addition, the in vitro release profile demonstrated a significant difference between rapid release of free honokiol and much slower and sustained release of honokiol micelles/hydrogel. The results suggested that the CDDS might have great potential applications in cancer chemotherapy.
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